Essentially the story is that these guys working for some kind of ocean research company discovered that the Navy was sending out some sort of sonar...bomb type thing that was causing whales to wash up on shore. AND ALSO MERMAIDS, OH FUCK. There's footage of the mermaids, but they sort of look like the Gravelings from the show Dead Like Me. The scientists explain that mermaids are a tangible idea, that they were a form of apes that went into the ocean, hunted fish, and bing bang boom, evolution happened, and mermaids were made.
It's pretty trippy. I want it to be true, or not, they paint the mermaids as scary motherfuckers swimming around with spears made of string ray tails.
Yea I know the video says Animal Planet, but I saw the shit on Discovery.
The scientists also talk about how humans are crazy similar to ocean creatures, like there are some people in Southeast Asia who can dilate their pupils at will in order to see better underwater. Damn nature, you scary.